Short Wave

Ever wonder why we call it the Dog Days of Summer? Today on the show — Emily gives Maddie an astronomical reason why we associate the sweltering heat of summer with the dog star, Sirius.

So, before the dog days are over, have a listen — perhaps as you head out to the sky in search of the dog star.

You can email the show at ShortWave@NPR.org.

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Science correspondent Nell Greenfieldboyce gives us the latest in gravitational waves and shares what scientists have learned (and heard) from these tiny ripples in spacetime.

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(Encore episode) The World Health Organization has called the spread of misinformation around the coronavirus an "infodemic." So what do you do when it's somebody you love spreading the misinformation? In this episode, Maddie talks with Invisibilia's Yowei Shaw about one man's very unusual approach to correcting his family. And we hear from experts about what actually works when trying to combat misinformation.

For more on how to do science communication right, check out our earlier episode How To Talk About The Coronavirus With Friends And Family.

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The Alzheimer's Association International Conference took place in Denver this year. Today on the show, NPR science correspondent Jon Hamilton talks to Maddie Sofia about what he learned at the conference, the latest on the controversial new drug Aduhelm, and the potential links between COVID and Alzheimer's.

You can follow more of Jon's reporting by clicking this link.

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Whales are more than just beautiful creatures — they play a vital role in the ocean's ecosystem. Today, Asha de Vos, marine biologist and pioneer of long-term blue whale research within the Northern Indian Ocean, explains why protecting whales is crucial for protecting the entire sea in this excerpt of TED Radio Hour.

Listen to the full episode, An SOS From The Ocean, here.

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Caregivers in the "Sandwich Generation" have reported a steep decline in mental health, as did others who had to juggle changes in the amount of caregiving they had to provide to loved ones. Caregivers have struggled with anxiety, depression and PTSD at rates much higher than those without caregiving roles. NPR correspondent Rhitu Chatterjee talks about the study and her reporting with Emily Kwong.

If you or anyone you know is struggling, help is available. Call the National Suicide Prevention Lifeline at 1-800-273-8255. You can also check out this previous episode, 'How To Reach Out When Someone You Know May Be At Risk Of Suicide.'

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There are thousands of species of lightning bug and they live all over the world except in Antarctica. Maddie and Emily discuss lots of other amazing tidbits about the family Lampyridae and talk about what humans can do to preserve the bugs, which are facing widespread habitat disruption.

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On Tuesday, the Centers for Disease Control and Prevention changed its guidance on wearing masks. Short Wave co-host Maddie Sofia and NPR health correspondent Allison Aubrey explain what's changed and why. Plus, the latest on the Delta variant, a highly transmissible strain of the coronavirus.

Want to see how widespread COVID-19 is in your local community? Check out this data tracker from NPR.

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Fire has always been part of California's landscape. But long before the vast blazes of recent years, Native American tribes held controlled burns that cleared out underbrush, encouraged new plant growth, and helped manage wildfires. It's a tradition that disappeared with the arrival of Western settlers. NPR climate correspondent Lauren Sommer explains how tribal leaders are trying to restore the practice by partnering up with state officials who are starting to see cultural burns as a way to help bring extreme wildfires under control. (Encore episode)

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Sweating is critical to helping humans avoid overheating, and it's different than how most animals cool down. Sarah Everts wanted to understand more about how humans came to sweat like we do, and wrote a book called The Joy of Sweat - which she talked about with Rhitu for this episode.

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It's a listener questions episode! Chuck, Short Wave fan, asks, "What is the current state of earthquake prediction systems?"

For some answers, Emily Kwong chats with Wendy Bohon, a geologist and Senior Science Communication Specialist for the Incorporated Research Institutions for Seismology (IRIS).

To look at real-time seismic data from hundreds of locations around the globe, check out the IRIS Station Monitor.

Have a question you want us to try answering? Email us at shortwave@npr.org.

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California is in the middle of a terrible drought. The rivers are running low, and most of its farmers are getting very little water this year from the state's reservoirs and canals. And yet, farming is going on as usual.

NPR food and agriculture correspondent Dan Charles explains how farmers have been using wells and underground aquifers to water their crops. But that's all set to change. California is about to put dramatic limits on the amount of water farmers can pump from their wells, and people have some pretty strong feelings about it.

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Squirrels are everywhere — living in our suburban neighborhoods to our city centers to our surrounding wilderness. Rhitu Chatterjee talks with researcher Charlotte Devitz about squirrels and how studying them might help us better understand the changing urban environment.

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We talk to NPR's India correspondent Lauren Frayer about the ridiculously complicated science involved in measuring Mount Everest, the world's highest peak. And why its height is ever-changing. (Encore episode)

Read Lauren's reporting on Mt. Everest.

Have other quirks of the planet on your mind? Tell us by emailing shortwave@npr.org.

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COVID-19 cases are on the rise in the last month due to the Delta variant. NPR correspondent Allison Aubrey talks with Emily Kwong about where the virus is resurging, how some public health officials are reacting and what they are recommending. Also, with a spate of outbreaks at summer camp, officials are weighing in on what parents can do before they send children to camp.

What

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As a kid, Jasmin Graham was endlessly curious about the ocean. Her constant questioning eventually led her to a career in marine science studying sharks and rays. But until relatively recently, she had never met another Black woman in her field.

That all changed last year when she connected with a group of Black women studying sharks through the Twitter hashtag #BlackInNature. Finding a community was so powerful that the women decided to start a group.

On today's show, Jasmin talks with host Maddie Sofia about Minorities in Shark Sciences (MISS) and how it's uplifting women of color through hands-on workshops and community building.

To see pictures of MISS's first workshop check out their website.

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July is National Ice Cream Month — and Sunday, July 18 is National Ice Cream Day (in the US)! Flavors range from the classics — vanilla and chocolate — to the adventurous — jalapeño and cicada. But for some people, including ice cream scientist Dr. Maya Warren, flavor is only one part of the ice cream allure. So in today's episode, Emily Kwong talks with Short Wave producer Thomas Lu about some of the processes that create the texture of ice cream, and how that texture plays into our enjoyment of the tasty treat.

You can follow Thomas on twitter @thomasuylu and Emily @emilykwong1234. Email the show with suggestions or thoughts at ShortWave@NPR.org.

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Delta is quickly becoming the dominant coronavirus variant in multiple countries. The variant has spread so fast because it is more contagious than the variants that came before it. At the same time, the U.S. is equipped with highly effective vaccines. Ed Yong, science writer for The Atlantic, talks with Maddie about the interaction between the variants and the vaccines and how that will be crucial in the months ahead.

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Contrary to sci-fi depictions in shows like Iron Man and Star Wars, getting from point A to point B in space is a tough engineering problem. NPR Science Correspondent Geoff Brumfiel explains how space propulsion actually works, and why some new technologies might be needed to get humans to Mars and beyond.

Follow Geoff Brumfiel and Short Wave co-host Emily Kwong on Twitter. Email the show at shortwave@npr.org.

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At the height of the pandemic, routine cancer screenings declined by 90 percent. Screenings are resuming and doctors are diagnosing later-stage cancers — cancers that might have been caught earlier. NPR science correspondent Yuki Noguchi of talks about whom this affects most, and about the ripple effects that missing cancer screening may have for years to come.

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On the mountaintop glaciers of the Pacific Northwest lives a mysterious, and often, overlooked creature. They're small, thread-like worms that wiggle through snow and ice. That's right, ice worms! NPR science correspondent Nell Greenfieldboyce talks to Emily about how they survive in an extreme environment and why scientists don't understand some of the most basic facts about them.

For more of Nell's reporting, you can follow her on Twitter @nell_sci_NPR. You can follow Emily @emilykwong1234.

Email the show with suggestions or thoughts at ShortWave@NPR.org.

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Summer's here. Time for a cool treat. So, you grab a popsicle from the freezer. Ahh ... that's better. Until, out of nowhere, a sharp sudden pain rushes to your forehead. You've got brain freeze!

We talk with neuroscientist Caroline Palavicino-Maggio about the science behind these short-lived cold-induced headaches. Plus, some listener mail.

What are your daily science curiosities? Email the show at shortwave@npr.org.

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FEMA acknowledges that the way it distributes aid often benefits some people more than others--and those who receive less aid are those people with the fewest resources to begin with. Rhitu Chatterjee talks with NPR climate correspondent Rebecca Hersher about her investigation into FEMA and why the federal government's response to disasters may disproportionately hurt people of color and their communities.

Read more of Rebecca's reporting in "Why FEMA Aid Is Unavailable To Many Who Need It The Most."

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People between the ages of 12 and 17 are now eligible to get the Pfizer COVID-19 vaccine and health officials expect this age group will soon be able to receive the Moderna one. So, health reporter Pien Huang and Short Wave producer Rebecca Ramirez talked to teens about their questions about the vaccine and what a strange year the pandemic has been for them.

Do you have questions about the coronavirus and the pandemic? Email shortwave@npr.org.

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With the help of ecologist Rodrigo Medellín, the "Bat Man of Mexico," Rasha Aridi (former Short Waver) presents the case for why bats are the best and coolest flying creatures out there!

Are you a scientist who thinks Rodrigo is wrong and that the animal you study is superior? Let us know! You can email us at shortwave@npr.org. We'd love to hear the case for your critter.

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(Encore episode) The 2016 movie Arrival, an adaptation of Ted Chiang's novella Story of Your Life, captured the imaginations of science fiction fans worldwide. Field linguist Jessica Coon, who consulted on the film, breaks down what the movie gets right — and wrong — about linguistics.

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When a disaster like a hurricane or wildfire destroys a house, the clock starts ticking. It gets harder for sick people to take their medications, medical devices may stop working without electricity, excessive temperatures, mold, or other factors may threaten someone's health. Every day without stable shelter puts people in danger.

The federal government is supposed to help prevent that cascade of problems, but an NPR investigation finds that the people who need help the most are often less likely to get it. NPR climate reporter Rebecca Hersher explains.

Check out Rebecca's full investigation here.

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A recent study published in Nature found that 37 percent of heat-related deaths are due to climate change. Dr. Renee Salas is seeing this in the emergency room of Massachusetts General Hospital. She's treating more and more patients for heat-related illnesses like heat stroke and intensified allergies. Today, she gives us a view into her work at the intersection of human health and climate change; plus, she envisions a new health care system that takes climate change into account.

To read more on this, see our episode page for links.

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As a kid, Ariana Remmel had a hard time figuring out where they fit in. So they found comfort in the certainty and understanding of what the world was made of: atoms and molecules and the periodic table of elements.

Years later, they went on to become a chemist and science writer. On today's show, Ari talks with host Maddie Sofia about how chemistry has helped them embrace their mixed identities.

For more, read Ari's recent essay in Catapult Magazine: 'Organic Chemistry Taught Me to Fully Inhabit My Mixed Identities.'

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Early in the pandemic, contact tracing was viewed as one of the best options to quell the spread of coronavirus infections. The idea was to have public health workers track down people who tested positive, figure out whom they'd been in touch with and quickly get those people to quarantine. Places like Hong Kong and Singapore made headlines for their success stories. The U.S. aimed to replicate this, but came up short. Today, health reporter Selena Simmons-Duffin explains what went awry and the lessons learned.

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The FDA has approved a new drug for Alzheimer's. But a lot of experts are skeptical about whether the drug works. Rhitu Chatterjee talks with science correspondent Jon Hamilton about the controversial drug aducanumab and why the U.S. Food and Drug Administration approved it.

For more of Jon's reporting, read "For Those Facing Alzheimer's, A Controversial Drug Offers Hope."

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The past year has been the driest or second driest in most Southwestern U.S. states since record-keeping began in 1895. Climate Correspondent Lauren Sommer reports that farms and cities have begun imposing water restrictions, but the water supply will shrink no matter what the weather brings. The supply spans tens of millions of people and the farmland that produces most of the country's fruits and vegetables. As a result, the people who manage the West's complex water systems are realizing that with climate change, they can no longer rely on the past to predict the future.

Read more of Lauren's reporting.

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Tam O'Shaughnessy and Sally Ride, the first American woman to fly in space, shared a passion for getting girls involved in STEM. It led them to co-found Sally Ride Science, a company focused on equity and inclusion in science education. But, there was much more to Tam and Sally's relationship. Tam gives us an intimate look at their decades-long partnership: how they met and fell in love, the pressures they faced as a queer couple, and their long-awaited and public coming out with Sally's death in 2012. We want to know which LGBTQ+ scientists have inspired you! Email the show at shortwave@npr.org.

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Health Correspondent Allison Aubrey updates us on the Biden Administration's goal to have 70 percent of U.S. adults vaccinated by the July 4. Plus, as vaccine makers plan for the possibility that COVID-19 vaccine boosters will be needed, they're pushing ahead with research into new-generation flu shots and mRNA cancer vaccines.

Questions? Existential dread? Optimism? We'd love to hear it — write us at shortwave@npr.org.

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The anus is an evolutionary marvel. But how and when did this organ evolve into what it is today? Today on Short Wave, Maddie gets to the bottom of these questions with The Atlantic's science writer Katherine Wu.

For more of Katherine's reporting, check out 'The Body's Most Embarrassing Organ Is an Evolutionary Marvel' from The Atlantic.

If you have stories ideas or comments — email us at ShortWave@NPR.org.

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Nearly 1 billion people speak Mandarin Chinese. But Short Wave host Emily Kwong is not among them. As a third generation Chinese American, Emily's heritage language was lost through the years when her father, Christopher Kwong, stopped speaking the language at a young age in order to adjust to life in the U.S. Now, at age 30, Emily's trying to reclaim Chinese by attending virtual Mandarin classes for the first time. In conversation with her father, Emily explores how being 'Chinese enough' gets tied up in language fluency, and how language is a bridge that can be broken and rebuilt between generations — as an act of love and reclamation.

Check out more of the Where We Come From series here.

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Hey, Nerd! NPR takes Juneteenth off. We'll be back Sunday with a special episode from NPR's Where We Come From series. It focuses on Emily Kwong's relationship to her heritage language and journey to learn Mandarin as an adult.

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#BlackBirdersWeek emerged last year from a groundswell of support for Christian Cooper, a Black man and avid birder, who was harassed by a white woman while birding in Central Park. This year is all about celebrating Black joy. Co-organizer Deja Perkins talks about how the week went and why it's important to observe nature wherever you live.

Send us your birding highlights! We're at shortwave@npr.org.

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Becoming fluent in a second language is difficult. But for adults, is it impossible? Short Wave hosts Maddie Sofia and Emily Kwong dissect the "critical period hypothesis," a theory which linguists have been debating for decades — with the help of Sarah Frances Phillips, a Ph.D. student in the linguistics department at New York University.

You can watch a related video about Emily learning Mandarin here. It's part of the Where We Come From series.

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Maddie talks with physicist Chanda Prescod-Weinstein about her new book, The Disordered Cosmos: A Journey into Dark Matter, Spacetime, and Dreams Deferred. In the episode, we talk quarks (one of the building blocks of the universe), intersectionality and access to the night sky as a fundamental right.

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It is one of the Earth's great migrations: each year, millions of monarch butterflies fly some 3,000 miles, from their summer breeding grounds as far north as Canada to their overwintering sites in the central Mexico. It's one of the best-studied migrations and in recent years, ecologists like Sonia Altizer have been able to better answer how and why these intrepid butterflies make the journey. Short Wave brings this episode from the TED Radio Hour's episode with Sonia Altizer, with the University of Georgia.

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After hearing a vicious rumor on the internet that vegetables aren't real, Maddie goes looking for answers. Turns out, vegetables are a mere culinary construct. Still healthful and delicious, but a kinda mythic category of food. With the help of Harvard botanist Molly Edwards, Maddie and Emily break down our favorite foods from broccoli to zucchini.

Take our survey! Tell us what you love and what you would love to see more of — on our show, and also other NPR podcasts.

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(Encore episode.) Scientists have known for decades that one of the main causes of the smell of fresh rain is geosmin: a chemical compound produced by soil-dwelling bacteria. But why do the bacteria make it in the first place? Reporter Emily Vaughn answers this mystery.

Read the paper on which this episode was based.

Take our survey! Tell us what you love and what you would love to see more of — on our show, and also other NPR podcasts.

Other scent mysteries driving your nose wild? Email the show at shortwave@npr.org and we might track down the answer.

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The Biden Administration is working to fight climate change in a way that also address the country's economic and racial disparities. Emily talks with NPR correspondent Dan Charles about why the ground work for a climate justice plan could be laid in the city of Cleveland.

For more of Dan's reporting, follow him on Twitter @NPRDanCharles.

You can email Short Wave at ShortWave@npr.org.


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Nationwide, almost 65% of adults have had at least one vaccine shot, but vaccination rates vary significantly depending on the state. NPR health correspondent Allison Aubrey gives us the latest on the country's vaccination progress: which states are on track (and which are not), new research about why it's important teenagers get vaccinated, and what we know about the possibility of booster shots.

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Paleontologist Yara Haridy looks at fossilized bones for a living. When she randomly walked by a scientific poster one day, she discovered an entirely new way to take pictures of her fossils. The results are shedding new light on how bones evolved.

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There's big change that's happening in the field of artificial limbs: artificial limbs that both move — and feel. NPR correspondent Jon Hamilton explains why touch is so important for people who are trying to control a state-of-the art robotic arm or a prosthetic limb.

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Short Wave reporter Emily Kwong speaks with Janina Jeff, the host and executive producer of In Those Genes, a "science and culture podcast that uses genetics to decode the lost histories of African descendants." They discuss what a person's genetic ancestry test does and does not reveal, and the complicated intersection of genetics, history and race.

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Researchers say the concept of achieving herd immunity threshold isn't the right finish line to end the pandemic. It's an elusive number to define in the first place, and it changes under various circumstances. Science correspondent Geoff Brumfiel talks with Maddie about the complexities in even defining the number and what the public should focus on instead.

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Happy Pride, Short Wave Listeners! Here's a fun episode from our archives to celebrate the month!

It's another "Back To School" episode where we take a concept you were maybe taught in school as a kid, but didn't really learn or just forgot. Short Wave producer Thomas Lu and host Maddie Sofia go on a journey to explore what a rainbow exactly is and how we see them! We all remember ROY G BIV, right?

Email us your Back-To-School ideas at shortwave@npr.org.

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